[vtkusers] CALLBACK / function pointers ?

[Antonin Perrot-Audet]

Hello all,

I have a hopefully simple problem, but I have been struggling for days 
and I hope someone has an answer :

I am trying to use *VTK callbacks* in a custom class :
The problem is that I can't get it to execute the function I created.

I get a :
*no matching function for call to 
'vtkCallbackCommand::SetCallback(<unresolved overloaded function type>)'*
when I try to compile.

It seems that it can't find my function based on its signature ?


I wrote a simple example :
--------------------------------------------------------
// all necessary includes

class A
{

//[...]
public:
//[...]


void SetObserversA ()
     {
         // I create a callback object
         vtkSmartPointer<vtkCallbackCommand> vtkCBSynchroCam = 
vtkSmartPointer<vtkCallbackCommand>::New();

         // HERE IS THE PROBLEM : I TRY TO SET THE CALLBACK FUNCTION
         vtkCBSynchroCam->SetCallback( A::Reaction );

           RenderWin->AddObserver( vtkCommand::AnyEvent, vtkCBSynchroCam );
     }


void Reaction ( vtkObject* caller, long unsigned int eventId, void* 
clientData, void* callData )
     {
     // do some stuff with the class' private
     }


private:
     vtkRenderWindow*    RenderWin;

};

--------------------------------------------------------


I also tried to use :
vtkCBSynchroCam->SetCallback( Reaction );
(without the A::)
but I still have the same error.


I would greatly appreciate if someone could take two minutes to help me 
with that.

Thanks !

-- 
Antonin